NextChallenge

Our client is looking for an experienced Senior Java Engineer.

Role Overview:We are looking for an experienced Java Engineer to join client's backend team, which is working on the back-office platform of a high-load B2B gaming system. Their platform processes millions of transactions daily and supports real-time operations for multiple partners. As the system continues to grow, the engineering team is expanding to improve scalability, performance, and reliability, while gradually evolving parts of the platform from a monolithic architecture toward distributed services. You will work on both new functionality and architectural improvements, helping modernise critical parts of the platform.Technology Stack:Java 8 / Java 17, Spring Framework, MSSQL 2019, Kafka, Redis, distributed services with parts of the system still evolving from a monolithic architecture.Key 

Responsibilities:

• Develop new backend functionality for the platform;
• Improve system performance, scalability, and reliability;
• Participate in refactoring and modernisation of legacy components;
• Contribute to architectural discussions and technical design;
• Investigate and resolve production issues;
• Assess technical feasibility and complexity of business requirements;
• Collaborate closely with backend engineers, technical leads, and product teams

Ideal profile for the position:

• 5+ years of Java development experience;
• Strong understanding of backend architecture and distributed systems;
• Experience working with relational databases and SQL;
• Familiarity with message-driven systems (Kafka or similar);
• Experience in improving or refactoring existing production systems;
• Strong problem-solving and debugging skills;
• Comfortable working in collaborative environments with code reviews and shared ownership of the codebase;
• English level: Intermediate or higher.

The company guarantees you the following benefits:

• Global Collaboration: Join an international team where everyone treats each other with respect and moves towards the same goal;
• Autonomy and Responsibility: Enjoy the freedom and responsibility to make decisions without the need for constant supervision;
• Competitive Compensation: Receive competitive salaries reflective of your expertise and knowledge as our partner seeks top performers;
• Remote Work Opportunities: Embrace the flexibility of fully remote work, with the option to visit company offices that align with your current location;
• Flexible Work Schedule: Focus on performance, not hours, with a flexible work schedule that promotes a results-oriented approach;
• Unlimited Paid Time Off: Prioritise work-life balance with unlimited paid vacation and sick leave days to prevent burnout;
• Career Development: Access continuous learning and career development opportunities to enhance your professional growth;
• Corporate Culture: Experience a vibrant corporate atmosphere with exciting parties and team-building events throughout the year;
• Referral Bonuses: Refer talented friends and receive a bonus after they successfully complete their probation period;
• Medical Insurance Support: Choose the right private medical insurance and receive compensation (full or partial) based on the cost;
• Flexible Benefits: Customise your compensation by selecting activities or expenses you'd like the company to cover, such as a gym subscription, language courses, Netflix subscription, spa days, and more;
• Education Foundation: Participate in a biannual raffle for a chance to learn something new unrelated to your job as part of your commitment to ongoing education.

Interview process:

• HR Interview with the Recruiter;
• Technical interview with the team;
• A 2-hour Final interview with the team.

If you find this opportunity right for you, don't hesitate to apply or get in touch with us if you have any questions!

Role Overview:

Our client is expanding the engineering team responsible for ensuring the stability and predictable behaviour of their distributed services and platforms. This role involves hands-on production work, including monitoring, incident response, troubleshooting, and continuous improvements that increase platform reliability over time.

You will work as part of an SRE shift rotation covering late-evening and night hours, ensuring end-to-end ownership of incidents — from identifying user impact to post-incident follow-ups and preventive improvements.

Key Responsibilities:

— Working in shift-based operations: monitoring, alert response, incident handling, escalation when needed;

— Participating in incident handling: initial classification, technical investigation, coordination with engineering teams, and following-up improvements;

— Developing and refining observability across platforms (metrics/alerts, dashboards, logs);

— Reducing operational toil: small automation, runbooks, and repeatable processes (the “make it easier next time” mindset);

— Collaborating with development teams to improve production readiness (basic reliability practices, cleaner incident follow-ups).

Ideal profile for the position:

Core skills:

— Good Linux skills in production environments (debugging basics, system services, logs, performance basics);

— Solid understanding of networking fundamentals (TCP/IP, DNS, HTTP, load balancing basics, TLS fundamentals);

— Experience with containers and image lifecycle basics (Docker or compatible runtimes);

— Ability to troubleshoot across application, network, and infrastructure layers using logs/metrics and simple tools (curl, basic traffic/log analysis; scripting is a plus);

— Basic familiarity with observability: metrics and alerting, dashboards, logging (any modern stack is fine).

Experience:

— 1+ year in a production-focused role (Ops / Support L2+ / DevOps / Junior SRE — what matters is real production exposure);

— Participation in production incidents (triage, investigation, escalation, basic follow-ups);

— Availability to cover late-evening and night shifts, in rotation.

SRE fundamentals (basic understanding):

— You understand the difference between “just running infra” and SRE as a discipline: reliability targets, fast detection, clear escalation, and consistent follow-up;

— You’re familiar with SLI/SLO and can explain them in simple words (high-level understanding is enough).

What will be an advantage:

— Familiarity with Kubernetes (deep production ownership is not required yet);

— Exposure to AWS services such as EC2, ALB/NLB, RDS, S3, and IAM basics;

— Exposure to Terraform and/or Ansible (small changes, basic understanding of principles);

— Experience working in high-availability environments where downtime actually matters.

The company guarantees you the following benefits:

— Global Collaboration: Join an international team where everyone treats each other with respect and moves towards the same goal;

— Autonomy and Responsibility: Enjoy the freedom and responsibility to make decisions without the need for constant supervision;

— Competitive Compensation: Receive competitive salaries reflective of your expertise and knowledge as our partner seeks top performers;

— Remote Work Opportunities: Embrace the flexibility of fully remote work, with the option to visit company offices that align with your current location;

— Paid Time Off: Prioritise work-life balance with paid vacation and sick leave days to prevent burnout;

— Career Development: Access continuous learning and career development opportunities to enhance your professional growth;

— Corporate Culture: Experience a vibrant corporate atmosphere with exciting parties and team-building events throughout the year;

— Referral Bonuses: Refer talented friends and receive a bonus after they successfully complete their probation period;

— Medical Insurance Support: Choose the right private medical insurance and receive compensation (full or partial) based on the cost;

— Flexible Benefits: Customise your compensation by selecting activities or expenses you'd like the company to cover, such as a gym subscription, language courses, Netflix subscription, spa days, and more;

— Education Foundation: Participate in a biannual raffle for a chance to learn something new unrelated to your job as part of your commitment to ongoing education.

Interview process:

— A 30-minute interview with a Recruiter to get to know you and your experience;

— 1st stage of technical interview (1 h) with the DevOps team to assess your theoretical skills;

— 2nd stage of technical interview (1 h) with the DevOps team to assess your hard skills;

— A final interview to gauge your fit with the company culture and working style.

If you find this opportunity right for you, don't hesitate to apply or get in touch with us if you have any questions!

Our client is looking for a Senior Database Administrator to be responsible for maintaining, optimising, and securing our databases to ensure high performance, availability, and reliability.

Role Overview:
Are you an experienced Database Administrator looking to grow in a fast-paced, innovative environment?

Do you enjoy working collaboratively and contributing across different stages of the project lifecycle? If so, we’d love to hear from you. We’re looking for someone with a proactive, growth-oriented mindset who can help strengthen and scale our infrastructure while ensuring its efficiency and reliability.

Join a team that values your expertise, supports your professional development, and gives you the opportunity to make a real impact. Apply now and become part of our dynamic journey.

Key Responsibilities:

• Collaboration with the development team;
• Reviewing the current infrastructure and planning improvements;
• Incident mitigation, if needed;
• Collaboration with the DevOps team to make our team excellent.

Ideal profile for the position:

• A minimum of 3 years of DBA experience (MS SQL Server). Proven technical troubleshooting skills;
• Hands-on experience with typical web components and approaches;
• Security practices;
• A sense of ownership;
• Data-driven decisions;
• Solving the root cause, not the symptoms;
• Self-learning (project and necessary skills);
• Upper-intermediate level of proficiency in English.

To be confident with a tech stack like:

• Administration of MS SQL servers;
• Database backup and archiving;
• Configuring SQL Server;
• Maintenance and creation of indexes;
• SQL Server performance monitoring and optimisation;
• Working with High Availability / Always ON groups;
• Optimisation of SQL queries;
• Development of procedures/functions;
• PostgreSQL experience is a plus;
• Experience administering servers running Windows Server;
• Active Directory administration experience;
• ClickHouse (or similar DB) experience not required, though award additional points.

The company guarantees you the following benefits:

• Global Collaboration: Join an international team where everyone treats each other with respect and moves towards the same goal;
• Autonomy and Responsibility: Enjoy the freedom and responsibility to make decisions without the need for constant supervision;
• Competitive Compensation: Receive competitive salaries reflective of your expertise and knowledge as our partner seeks top performers;
• Remote Work Opportunities: Embrace the flexibility of fully remote work, with the option to visit company offices that align with your current location;
• Flexible Work Schedule: Focus on performance, not hours, with a flexible work schedule that promotes a results-oriented approach;
• Unlimited Paid Time Off: Prioritise work-life balance with unlimited paid vacation and sick leave days to prevent burnout;
• Career Development: Access continuous learning and career development opportunities to enhance your professional growth;
• Corporate Culture: Experience a vibrant corporate atmosphere with exciting parties and team-building events throughout the year;
• Referral Bonuses: Refer talented friends and receive a bonus after they successfully complete their probation period;
• Medical Insurance Support: Choose the right private medical insurance and receive compensation (full or partial) based on the cost;
• Flexible Benefits: Customise your compensation by selecting activities or expenses you'd like the company to cover, such as a gym subscription, language courses, Netflix subscription, spa days, and more;
• Education Foundation: Participate in a biannual raffle for a chance to learn something new unrelated to your job as part of your commitment to ongoing education.

Interview process:

• HR Interview with the Recruiter;
• A 1-hour Technical interview;
• A 1-hour Final interview with the team.

If you find this opportunity right for you, don't hesitate to apply or get in touch with us if you have any questions!

We are hiring a Customer Support Agent to provide high-quality client service for online products.
 

Role Overview:

We are looking for a Customer Support Agent for a fully remote role, acting as the main point of contact for customers and collaborating with internal teams to resolve issues.
 

Key Responsibilities:

• Act as the main point of contact for customers actively using the product;
• Respond to customer inquiries in a timely and professional manner;
• Provide customer support via email and chat;
• Gain a good understanding of the product to effectively answer customer questions;
• Communicate with other team members to find solutions when needed;
• Escalate inquiries to the relevant departments when required.

(Full training will be provided.)
 

Ideal profile for the position:

• Fluent Polish speaker;
• Good communication skills and customer-oriented mindset;
• Active listening skills, patience, and attention to detail;
• Ability to manage time effectively in a shift-based environment;
• Affinity with technology;
• Previous Customer Support experience is required;
• Previous iGaming experience is a plus;
• English level: B2 for internal communication.
   

Work Model & Schedule:

• Fully remote role;
• Shift-based position;
• Day shifts only (no night shifts);
• Working days: 4 days on / 2 days off;
• Shifts may include weekends.
   

The company guarantees you the following benefits:

• A positive workplace atmosphere that creates a culture of collaboration and support, making it a place you'll love working in;
• Competitive compensation and regular career development reviews;
• A generous vacation and sick leave policy, allowing you to take time off and enjoy a work-life balance;
• Financial assistance for professional development, helping you stay ahead of the curve and love your career path;
• Educational Allowances that give you the opportunity to expand your knowledge and experience;
• You'll have a monthly allowance for personal activities, giving you the opportunity to pursue your interests and hobbies outside of work;
• A comprehensive health insurance plan, depending on your current location;
• Referral program with financial rewards for bringing top talent to the company;
• Engaging in team-building activities and corporate parties.
   

Interview process:

1. HR Interview with a recruiter;
2. Final interview with the team;
3. Final decision.
    

If you find this opportunity right for you, don't hesitate to apply or get in touch with us if you have any questions!

Advance your SEO career with a clear focus on commercial impact and organic growth.

Role Overview:

We’re looking for a data-driven SEO professional who thrives on performance insights, technical excellence, and measurable organic growth.

Key Responsibilities:

• Own and execute the end-to-end SEO strategy, covering technical, on-page, and off-page optimisation;
• Define SEO priorities based on business goals, ICPs, commercial intent, and market opportunities;
• Drive sustainable organic growth across priority markets, products, and verticals;
• Ensure optimal website health, including crawlability, indexation, site architecture, and page performance;
• Lead technical SEO audits and coordinate implementation with web and development teams;
• Manage SEO requirements for site updates, new pages, releases, and migrations;
• Optimise Core Web Vitals, mobile performance, and overall search engine compliance;
• Develop keyword frameworks focused on high-intent and commercially relevant queries;
• Collaborate closely with content, performance marketing, and revenue teams to support demand generation;
• Define, track, and report on SEO KPIs (traffic quality, rankings, conversions, assisted revenue);
• Forecast organic growth impact and identify risks, bottlenecks, and optimisation opportunities;
• Provide leadership with clear visibility into SEO performance and its contribution to pipeline growth.

Ideal profile for the position:

• Proven experience in senior SEO roles, ideally in B2B, SaaS, iGaming, or tech environments;
• Strong technical SEO expertise (site architecture, crawlability, indexation, Core Web Vitals, performance optimisation);
• Strategic mindset with the ability to align SEO initiatives with commercial and revenue goals;
• Hands-on experience with SEO tools and platforms (Google Search Console, GA4, Ahrefs, SEMrush, Screaming Frog, or equivalents);
• Experience with international and multi-language SEO;
• Strong analytical skills with the ability to translate SEO data into business-relevant insights;
• Excellent written and verbal communication skills;
• Full professional proficiency in English;
• High level of ownership, accountability, and autonomous project management.

Tools & Platforms:

• Consistent growth in high-intent organic traffic;
• Improved rankings for commercially relevant keywords;
• A strong, scalable technical SEO foundation;
• Clear and measurable contribution of SEO to demand generation and pipeline;
• Effective alignment between SEO, content, web, and revenue initiatives.

The company guarantees you the following benefits:

• Global Collaboration: Join an international team where everyone treats each other with respect and moves towards the same goal;
• Autonomy and Responsibility: Enjoy the freedom and responsibility to make decisions without the need for constant supervision;
• Competitive Compensation: Receive competitive salaries reflective of your expertise and knowledge as our partner seeks top performers;
• Remote Work Opportunities: Embrace the flexibility of fully remote work, with the option to visit company offices that align with your current location;
• Flexible Work Schedule: Focus on performance, not hours, with a flexible work schedule that promotes a results-oriented approach;
• Unlimited Paid Time Off: Prioritise work-life balance with unlimited paid vacation and sick leave days to prevent burnout;
• Career Development: Access continuous learning and career development opportunities to enhance your professional growth;
• Corporate Culture: Experience a vibrant corporate atmosphere with exciting parties and team-building events throughout the year;
• Referral Bonuses: Refer talented friends and receive a bonus after they successfully complete their probation period;
• Medical Insurance Support: Choose the right private medical insurance and receive compensation (full or partial) based on the cost;
• Flexible Benefits: Customise your compensation by selecting activities or expenses you'd like the company to cover, such as a gym subscription, language courses, Netflix subscription, spa days, and more;
• Education Foundation: Participate in a biannual raffle for a chance to learn something new unrelated to your job as part of your commitment to ongoing education.

Interview process:

1. HR Interview with the Recruiter;
2. Test Task;
3. A 2-hour Final interview with the team.

If this opportunity sounds like a good fit for you, feel free to apply or reach out with any questions!

We are looking for an experienced JavaScript developer with a strong understanding of React.

Role Overview:We are looking for an experienced JavaScript developer with a deep understanding of React. The main responsibilities will include the development of user interface components, refactoring and optimisation of existing code, and participation in mobile application development. Companies' projects are stable and long-term, with an active backlog of new front-office features.Key Responsibilities:

• Performing a technical assessment of business requirements to ensure the possibility of their implementation within a reasonable time;
• Fixing bugs in existing projects;
• Refactoring and optimising existing code;
• Optimising components for maximum performance across browsers;
• Creating new and modifying existing websites;
• Be proactive in communication with team members.

Ideal profile for the position:

• 5+ years of experience as a Front-End Engineer;
• Solid background in coding pure JavaScript;
• Strong proficiency in React 18+, including hooks, context, and modern patterns;
• Expert-level TypeScript experience with advanced types and strict configurations;
• Strong knowledge of state management tools (Redux, MobX, Zustand, etc.);
• Proven experience in building SPAs, PWAs, and working with RESTful and GraphQL APIs;
• Familiarity with front-end build tools (Webpack, Vite, Rollup) and CI/CD pipelines;
• Solid understanding of browser rendering behaviour and performance optimisation;
• Experience with automated testing frameworks (Jest, Cypress, etc.);
• At least 1-2 years of professional experience with React Native;
• Hands-on experience developing a React Native SDK for cross-platform projects;
• Level of English language – Upper-Intermediate or higher.

Will be a plus:

• Experience with micro frontends, monorepos, or component libraries (Storybook, Bit);
• Knowledge of design systems (Material UI, Tailwind, or similar);
• Exposure to WebAssembly, WebSockets, or real-time applications;
• Experience integrating third-party tools and libraries (e.g. Trustly, Whizdom);
• Ability to understand business requirements and translate them into technical requirements.

The company guarantees you the following benefits:

• Global Collaboration: Join an international team where everyone treats each other with respect and moves towards the same goal;
• Autonomy and Responsibility: Enjoy the freedom and responsibility to make decisions without the need for constant supervision.
• Competitive Compensation: Receive competitive salaries reflective of your expertise and knowledge as our partner seeks top performers.
• Remote Work Opportunities: Embrace the flexibility of fully remote work, with the option to visit company offices that align with your current location.
• Flexible Work Schedule: Focus on performance, not hours, with a flexible work schedule that promotes a results-oriented approach;
• Unlimited Paid Time Off: Prioritise work-life balance with unlimited paid vacation and sick leave days to prevent burnout;
• Career Development: Access continuous learning and career development opportunities to enhance your professional growth;
• Corporate Culture: Experience a vibrant corporate atmosphere with exciting parties and team-building events throughout the year;
• Referral Bonuses: Refer talented friends and receive a bonus after they successfully complete their probation period;
• Medical Insurance Support: Choose the right private medical insurance and receive compensation (full or partial) based on the cost;
• Flexible Benefits: Customise your compensation by selecting activities or expenses you'd like the company to cover, such as a gym subscription, language courses, Netflix subscription, spa days, and more;
• Education Foundation: Participate in a biannual raffle for a chance to learn something new unrelated to your job as part of your commitment to ongoing education.

Interview process:

1. HR Interview with the Recruiter;
2. A 1-hour Tech Interview;
3. A 1.5-hour Final interview with the team.

If you find this opportunity right for you, don't hesitate to apply or get in touch with us if you have any questions!

Our Partner is looking for a Junior Affiliate manager to join a strong Marketing Team.
 

Role Overview: 
Our client's marketing department is expanding, and we are in search of a Junior Affiliate Manager. You will be part of a growing marketing team, which currently consists of 50+ people, including affiliate, SEO, and technical teams. There are many different tasks and challenges to get excited about! You can be creative with your work, as we are always open to new ideas in finding and testing new sources. We are not just looking for a team member who will work with basic partners (create links, update promotions, and keep track of them). We are looking for someone who would be interested in constantly testing new products in affiliate marketing. The company is constantly generating new traffic, not only bringing new customers to their sites but also helping to identify the strengths and weaknesses of products with the help of these customers. This allows the product team to improve these products.

Key Responsibilities:

• Develop and expand existing and new affiliates;
• Fulfil department and personal KPIs;
• Regularly review affiliate performances to measure affiliate effectiveness and ensure profitability;
• Identifying and monitoring the ROI;
• Monitor the affiliate’s marketing spend, and ensure it is in line with agreed budgets;
• Ensure all affiliates’ marketing material is up to date: campaigns, design, landing pages, bonus offers, links, etc.

Ideal profile for the position:

• 1+ year of experience as an Affiliate manager in iGaming (tier-1/tier-2);
• Upper-intermediate English or higher;
• Upper-intermediate Portuguese or higher;
• Experience as an Affiliate manager with strong planning and organisational skills;
• A strong negotiator with excellent written and verbal skills;
• Ability to understand and interpret data to make informed decisions and drive profitability;
• Experience with CPA, RevShare, Hybrid, and other Affiliate Deals;
• Good analytics and fraud management skills

The company guarantees you the following benefits:

• A positive workplace atmosphere that creates a culture of collaboration and support, making it a place you'll love working in;
• Competitive compensation and regular career development reviews;
• Flexible working hours and remote working options, you'll enjoy the freedom that the company provides;
• A generous vacation and sick leave policy, allowing you to take time off and enjoy a work-life balance;
• Financial assistance for professional development, helping you stay ahead of the curve and love your career path;
• Educational Allowances that give you the opportunity to expand your knowledge and experience;
• You'll have a monthly allowance for personal activities, giving you the opportunity to pursue your interests and hobbies outside of work;
• A comprehensive health insurance plan, depending on your current location;
• Referral program with financial rewards for bringing top talent to the company;
• Engaging in team-building activities and corporate parties.

Interview process:

• HR Interview with the Recruiter;
• Test task;
• Final interview with the team;
• Final decision.

If you find this opportunity right for you, don't hesitate to apply or get in touch with us if you have any questions!